CN2694039Y

CN2694039Y - Roller-type one way clutch with spring protection structure

Info

Publication number: CN2694039Y
Application number: CN 200320102687
Authority: CN
Inventors: 高佩青
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-12
Filing date: 2003-11-12
Publication date: 2005-04-20
Anticipated expiration: 2013-11-12

Abstract

The utility model discloses a roller-type one way clutch with a spring(3)and a camber circle of clutch gear(1). One end of the spring(3)sustains on the bearing surface(2), on which exists a jut(4) that is between the spring(3) and the camber circle of clutch gear(1). The roller-type one way clutch of the utility model can prevent the spring from inward bias in spin process efficiently, the spring is made not to generate friction with the camber circle of clutch gear and using life of the spring is extended, so that the using life of the roller-type one way clutch is extended.

Description

Roller-type one way clutch with spring protection structure

Technical field

The utility model relates to a kind of clutch, particularly a kind of roller-type one way clutch.

Background technique

Common roller-type one way clutch, generally be used for automobile starter, its structure as shown in Figure 1, this roller-type one way clutch is engaged in the starter motor gear ring by overrunning clutch in the vehicle starting process, form starter motor startup effect, start the back overrunning clutch and be subjected to that starter motor is counter to be dragged, rotating speed is up to ten thousand rev/mins of 1-2, and under high speed rotating, spring 3 reaches ten thousand rev/mins of 1-2 too.When the overrunning clutch high speed rotating, because the supporting surface 2 of spring 3 is planes, therefore, spring 3 is easily to bias internal, make spring 3 and clutch teeth camber of wheels circle 1 produce friction, produce high temperature, make spring 3 annealing, reduce the hardness of spring 3, cause spring 3 to damage, overrunning clutch is skidded, thereby make overrunning clutch become twin-direction clutch, cause starter motor to damage.

Summary of the invention

The utility model has overcome the shortcoming of prior art, and a kind of roller-type one way clutch that prevents that the roller-type one way clutch spring from moving inward is provided, and a kind of roller-type one way clutch that can stablize clutch teeth camber of wheels circle better also is provided.

In order to achieve the above object, a kind of roller-type one way clutch of the present utility model has the spring and clutch teeth camber of wheels circle, and described spring is supported on the supporting surface, on supporting surface, between spring and clutch teeth camber of wheels circle, a projection is arranged.

The height of projection is 1 with the steel wire diameter of spring ratio: (0.3-1.2).The cross section of projection can be semicircle.

Distance between the end face of described supporting surface and the clutch teeth camber of wheels circle is dwindled a millimeter 0.5-1 millimeter.

On supporting surface, with the contacted position of spring end be a plane, after this plane prolongs, by the center of circle of clutch teeth camber of wheels circle.

Roller-type one way clutch of the present utility model, owing on the supporting surface of spring, added projection, can prevent effectively to bias internal at the rotary course medi-spring, make spring not produce friction with clutch teeth camber of wheels circle, prolong the working life of spring, thereby prolonged the working life of roller-type one way clutch.

Distance between the end face of supporting surface and the clutch teeth camber of wheels circle is dwindled, and the clutch teeth camber of wheels has been justified stable effect.

Description of drawings

Fig. 1 is the sectional structure chart of existing roller-type one way clutch;

Fig. 2 is the sectional structure chart of the utility model embodiment's roller-type one way clutch;

Fig. 3 is the partial enlarged drawing of the utility model embodiment's roller-type one way clutch.

Embodiment

With reference to the Fig. 2 in the accompanying drawing, Fig. 3 will be described in detail embodiment of the present utility model.

As shown in Figure 2, end at the spring 3 of overrunning clutch of the present utility model is supported on the supporting surface 2, between spring 3 and clutch teeth camber of wheels circle 1, increases a projection 4, the cross section of this projection 4 can be semicircle, partial enlarged drawing as shown in Figure 3, this semicircular radius is R, other parameters among the figure, as: H, R, r, φ ₁, φ ₂Model according to roller-type one way clutch is decided, and the height of described projection 4 is 1 with the steel wire diameter ratio of spring 3: (0.3-1.2).

When increasing projection, the distance between the end face of supporting surface 2 and the clutch teeth camber of wheels circle 1 is dwindled the 0.5-1 millimeter, plays a part stable to clutch teeth camber of wheels circle 1.

On supporting surface 2, with contacted position, spring 3 ends be a plane, after this plane prolongs, by the center of circle of clutch teeth camber of wheels circle 1.

Overrunning clutch of the present utility model can adopt cold extruding technique to make, thus on supporting surface 2, when increasing projection, produce aduncate shape at the back side of supporting surface 2,

The effect example

1, endurance test

According to 3.11 technical requirements among the standard JB/T6705-93, to overrunning clutch endurance test of the present utility model, test number (TN) 15000 times, do not have skid, damage and anomaly take place, when test number (TN) reaches 20000 times, still do not have skid, damage and anomaly take place.

2, surmount performance test

Surmounting performance test carries out on simulator stand, the starter driving gear rotating speed is at 15000 rev/mins, the starter motor rotating speed is at 12000 rev/mins, starter motor turned round 2 seconds under voltage rating, about 15 seconds of adjacent twice intertrial interval, carried out altogether 3 times, all do not have skid, damage and anomaly take place.

Roller-type one way clutch spring failure when high speed rotating has been avoided in evidence, the utility model, has prolonged the working life of roller-type one way clutch.

Claims

1, a kind of roller-type one way clutch with spring protection structure; spring (3) is arranged; with clutch teeth camber of wheels circle (1); one end of described spring (3) is supported on the supporting surface (2); it is characterized in that on supporting surface (2); between spring (3) and clutch teeth camber of wheels circle (1), a projection (4) is arranged.

2, roller-type one way clutch according to claim 1 is characterized in that, the steel wire diameter ratio of the height of projection (4) and spring (3) is 1: (0.3-1.2).

3, roller-type one way clutch according to claim 1 and 2 is characterized in that, the cross section of projection (4) is semicircle.

4, roller-type one way clutch according to claim 3 is characterized in that, on supporting surface (2), with contacted position, spring (3) end be a plane, after this plane prolongs, by the center of circle of clutch teeth camber of wheels circle (1).